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/****************************************************************************** |
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* Top contributors (to current version): |
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* Yancheng Ou |
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* |
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* This file is part of the cvc5 project. |
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* |
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* Copyright (c) 2009-2021 by the authors listed in the file AUTHORS |
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* in the top-level source directory and their institutional affiliations. |
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* All rights reserved. See the file COPYING in the top-level source |
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* directory for licensing information. |
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* **************************************************************************** |
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* |
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* Optimizer for BitVector type. |
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*/ |
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#ifndef CVC5__OMT__BITVECTOR_OPTIMIZER_H |
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#define CVC5__OMT__BITVECTOR_OPTIMIZER_H |
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#include "omt/omt_optimizer.h" |
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namespace cvc5::omt { |
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/** |
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* Optimizer for BitVector type |
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*/ |
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class OMTOptimizerBitVector : public OMTOptimizer |
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{ |
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public: |
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OMTOptimizerBitVector(bool isSigned); |
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virtual ~OMTOptimizerBitVector() = default; |
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smt::OptimizationResult minimize(SmtEngine* optChecker, |
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TNode target) override; |
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smt::OptimizationResult maximize(SmtEngine* optChecker, |
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TNode target) override; |
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private: |
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/** |
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* Computes the BitVector version of (a + b) / 2 without overflow, |
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* rounding towards -infinity: -1.5 --> -2 and 1.5 --> 1 |
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* same as the rounding scheme for int32_t |
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**/ |
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BitVector computeAverage(const BitVector& a, |
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const BitVector& b, |
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bool isSigned); |
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/** Is the BitVector doing signed comparison? **/ |
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bool d_isSigned; |
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}; |
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} // namespace cvc5::omt |
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#endif /* CVC5__OMT__BITVECTOR_OPTIMIZER_H */ |